Chapter 3 Chassis Cooling System; Chapter 3 Chassi Cooling System; Cooling System Overview; Chassis Airflow - Cisco CRS-1 System Description

Cooling System Overview

Chassis Airflow

Figure 3-1
chassis pulls in ambient air and passes it through the card cage. Warm air is exhausted out the top rear
of the chassis through the fans. An air filter above the power shelf filters the incoming air.
Figure 3-1
Power shelf
Note
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
3-2
shows how air moves through the line card chassis. The air inlet at the bottom front of the
Airflow Through Cisco CRS 4-Slot Line Card Chassis
Chassis
air inlet
air inlet
Front
The chassis card cage has a maximum airflow of 880 cubic feet (24,919 liters) per minute.
Power supplies
and power shelf
Chapter 3 Chassis Cooling System
Air exhaust
Fan tray
Air exhaust
Midplane
Air filter
Rear
OL-10805-10